But fear not, the Brazilian babe didn't forfeit her mane for the sake of fashion - it was all a case of clever, and rather convoluted, computer trickery.

Of course, when you are Ms Bündchen, the world's highest-earning model, there's simply no need for you to undergo dramatic transformations - you just get someone else to do it for you. Enter Bündchen's very game body double, who had her hair cut in the very style we see in the campaign and then mimicked Bündchen's poses. The two images were then digitally blended by master retoucher Pascal Dangin.

Gisele herself had to arrive at the shoot three hours early to have a bald cap fitted and then painted to her exact skin tone - a bald cap which had been fitted on another body double (yes, she has two) by Hollywood prosthetics specialist Jane Choi a few days previously.